Since no one can be excluded from the protection the idea of contributing less or not at all may be tempting to the unscrupulous citizens. Depending the method of aquiring information from the citizens about their preferences and abilities inhabitants can misinform in many ways in order to pay smaller amount than would be equitable (if the real preferences and abilities of entire community were widely known).

The idea of deciding not to develop the system may be appealing as well, because particular agent can expect careful neighbours to maintain their own monitoring or lights which she could benefit from. 

